A comparative study of analytical methodologies to determine the soil organic matter content of Lithuanian Eutric Albeluvisols

Jankauskas, B.; Šlepetienė, Alvyra; Jankauskienė, G.; Fullen, Michael A.; Booth, Colin A.

doi:10.1016/j.geoderma.2006.05.015

Cited by 43 publications

(30 citation statements)

References 18 publications

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“…For samples with apparent larger amount of SOM, there is a larger LOI, such as MA0-19 and MA80-100, which is similar to the previous studies (Konen et al 2002;Jankauskas et al 2006;Abella and Zimmer 2007). The overall LOI values for surface soil samples are larger than those for subsurface soil samples.…”

Section: Loss On Ignition Results Of Soil Samplessupporting

confidence: 86%

Soil mineral structural water loss during loss on ignition analyses

Sun¹,

Nelson²,

Chen³

et al. 2009

Can. J. Soil. Sci.

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Sun, H., Nelson, M., Chen, F. and Husch, J. 2009. Soil mineral structural water loss during loss on ignition analyses. Can. J. Soil Sci. 89: 603Á610. Water loss from soil minerals has been known to cause errors in the determination of soil organic matter when the loss on ignition (LOI) method is used. Unfortunately, no known published studies reliably quantify the range of structural water in the soil. To do this, 15 common reference minerals were analyzed by LOI to obtain their individual water loss. In addition, 14 upland, loamy soil samples and 3 wetland/hydric soil samples with varied mineral contents were analyzed to collect their X-ray powder diffraction spectra. Based upon X-ray spectra peak intensities, the modal abundance of minerals in each soil sample was determined using the RockJock computer program. The resultant modal weight percentages of all identified minerals in each soil sample were then multiplied by the LOI value for each mineral to obtain the mineral structural water loss (SWL) of that soil sample. For the 17 soil samples analyzed, the range of mineral water loss is 0.56 to 2.45%. Depending on the LOI values of the soil samples, the SWL:LOI ratios range from 0.04 to around 1.00. The SWL:LOI ratios are particularly low for top wetland soil when the LOI value is higher. The ratios are lower for surface soil samples than for subsurface soil samples because of the high LOI values in surface soil samples. Understanding soil mineral water loss and its relation to the LOI patterns from various environments is important for the accurate evaluation of soil organic matter when the LOI method is used.Key words: Mineral, structural water, loss on ignition Sun, H., Nelson, M., Chen, F. et Husch, J. 2009. Perte structurelle d'eau par les mine´raux du sol lors des analyses de perte par calcination. Can. J. Soil Sci. 89: 603Á610. On sait que l'eau perdue par les mine´raux du sol cause des erreurs lorsqu'on s'efforce de calculer la quantite´de matie`re organique dans le sol par la me´thode d'analyse de perte par calcination (LOI). Malheureusement, aucune des e´tudes publie´es ne quantifie de manie`re fiable la variation de l'eau structurelle dans le sol. Pour y reme´dier, les auteurs ont analyse´15 mine´raux de re´fe´rence communs par la LOI afin d'en mesurer la perte d'eau. Ils ont aussi analyse´14 e´chantillons de sol loameux des plateaux et 3 e´chantillons de sol hydrique des terres humides afin de recueillir le spectre de leur poudre par diffraction des rayons X. En partant de l'intensite´des pics obtenus aux rayons X, ils ont e´tabli l'abondance modale des mine´raux dans chaque e´chantillon graˆce au logiciel RockJock. Les pourcentages modaux ponde´re´s des mine´raux identifie´s dans chaque e´chantillon qui en re´sultent ont ensuite e´te´multiplie´s par la valeur LOI de chaque mine´ral, ce qui a donne´la perte structurelle d'eau (SWL) du mine´ral pour l'e´chantillon. Sur les 17 e´chantillons examine´s, la perte d'eau des mine´raux varie de 0,56 % a`2,45 %. D'apre`s la valeur LOI des e´chantillons, le ...

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Section: Loss On Ignition Results Of Soil Samplessupporting

confidence: 86%

Soil mineral structural water loss during loss on ignition analyses

Sun¹,

Nelson²,

Chen³

et al. 2009

Can. J. Soil. Sci.

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“…The survey collected and analyzed soil samples for genesis, physical, chemical and biological properties. The SOM content was tested using the potassium dichromate titrimetric method (Jankauskas et al, 2006). The SOM data in this study were obtained for 258 soil samples (0-20 cm), together with the corresponding GPS location coordinates.…”

Section: Data Collectionmentioning

confidence: 99%

Increase in soil organic carbon by agricultural intensification in northern China

Yan

Meng

et al. 2015

Biogeosciences

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Abstract. Agricultural intensification has contributed greatly to the sustained food supply of China's population of 1.3 billion over the 30-year period from 1982 to 2011. Intensification has several and widely recognized negative environmental impacts including depletion of water resources, pollution of water bodies, greenhouse gas emissions and soil acidification. However, there have been few studies over this period on the impacts of intensification on soil organic carbon (SOC) at the regional level. The present study was conducted in Huantai County, a typical intensive farming region in northern China, to analyze the temporal dynamics of SOC influenced by climate and farming practices. The results indicate that from 1982 to 2011, SOC content and density in the 0-20 cm layer of the cropland increased from 7.8 ± 1.6 to 11.0 ± 2.3 g kg −1 (41 %) and from 21.4 ± 4.3 to 33.0 ± 7.0 Mg ha −1 (54 %), respectively. The SOC stock (0-20 cm) of the farmland for the entire county increased from 0.75 to 1.2 Tg (59 %). Correlation analysis revealed that incorporation of crop residues significantly increased SOC, while an increase in the mean annual temperature decreased the SOC level. Therefore, agricultural intensification has increased crop productivity and contributed to SOC sequestration in northern China. In the near future, more appropriate technologies and practices must be developed and implemented for a maintenance or enhancement of SOC in this region and elsewhere in northern China, which also reduce non-CO 2 greenhouse gas emissions, since the climate benefit from the additional SOC storage is estimated to be smaller than the negative climate impacts of N 2 O from N fertilizer additions.

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“…SOCC DC = 0.40, SD: 0.02; avg. SOCC WO = 0.36, SD: 0.02), the t test (Sokal and Rohlf 1995) was applied to both data sets with and without the application of general conversion coefficient between DC and WO methods compiled by Jankauskas et al (2006). Based on the test results, alternative hypothesis about significant difference between sample means was rejected (P = 0.83-0.57).…”

Section: Soil Analysesmentioning

confidence: 99%

High organic carbon stock in a karstic soil of the Middle-European Forest Province persists after centuries-long agroforestry management

Ahmed¹,

Pichler

Homolák

et al. 2012

Eur J Forest Res

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Little is known on soil organic carbon (SOC) stocks in karst areas worldwide, although many of them have seen long-term application of agroforestry systems with a potential for carbon sequestration. Therefore, our study aimed to assess landscape-level SOC concentration and stock in the Silica Plateau, a part of the Slovak Karst Biosphere Reserve located in the Western Carpathians (Slovakia) with a centuries-long agroforestry record. The most represented local soil units are Chromi-Rendzic Leptosols and Chromic Cambisols with clayey loam texture, C/N ratio 9-12, and pH H 2 O 6.6-6.2 in their organo-mineral surface horizons. Mull surface humus form prevails under mixed forest stands dominated by hornbeam (Carpinus betulus L.), oak (Quercus petraea L.), and beech (Fagus sylvatica L.). A total of 2,700 soil samples were collected from 150 soil pits. Both SOC concentrations and stocks were determined for the 0-60 cm mineral soil layer. Soil stoniness was accounted for by means of electrical resistivity tomography. According to the analysis of covariance, cropland SOC concentration (0.026 g g -1 ) is significantly lower compared to forestland (0.040 g g -1 ) and pastureland (0.041 g g -1 ) (P \ 0.01). During the period of 130 years after forest clearing, cropland SOC stock has been reduced at an exponential decay rate of ca 0.002 year -1 , while the SOC stock in pastureland has increased following land use change from cropland by approximately 30% during the same period of time. Irrespective of land use history, overall SOC stock is high reaching on average 207.4 Mg ha -1 , out of which 66% are stored within 0-30 cm and 34% within 30-60 cm soil layers.

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A comparative study of analytical methodologies to determine the soil organic matter content of Lithuanian Eutric Albeluvisols

Cited by 43 publications

References 18 publications

Soil mineral structural water loss during loss on ignition analyses

Soil mineral structural water loss during loss on ignition analyses

Increase in soil organic carbon by agricultural intensification in northern China

High organic carbon stock in a karstic soil of the Middle-European Forest Province persists after centuries-long agroforestry management

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